Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
57397d86 JK |
2 | * fs/f2fs/namei.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/ctype.h> | |
50732df0 | 16 | #include <linux/dcache.h> |
feb7cbb0 | 17 | #include <linux/namei.h> |
57397d86 JK |
18 | |
19 | #include "f2fs.h" | |
953a3e27 | 20 | #include "node.h" |
57397d86 JK |
21 | #include "xattr.h" |
22 | #include "acl.h" | |
a2a4a7e4 | 23 | #include <trace/events/f2fs.h> |
57397d86 JK |
24 | |
25 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
26 | { | |
4081363f | 27 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
28 | nid_t ino; |
29 | struct inode *inode; | |
30 | bool nid_free = false; | |
e479556b | 31 | int err; |
57397d86 | 32 | |
a014e037 | 33 | inode = new_inode(dir->i_sb); |
57397d86 JK |
34 | if (!inode) |
35 | return ERR_PTR(-ENOMEM); | |
36 | ||
e479556b | 37 | f2fs_lock_op(sbi); |
57397d86 | 38 | if (!alloc_nid(sbi, &ino)) { |
e479556b | 39 | f2fs_unlock_op(sbi); |
57397d86 JK |
40 | err = -ENOSPC; |
41 | goto fail; | |
42 | } | |
e479556b | 43 | f2fs_unlock_op(sbi); |
57397d86 | 44 | |
70ff5dfe | 45 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
46 | |
47 | inode->i_ino = ino; | |
57397d86 JK |
48 | inode->i_blocks = 0; |
49 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
50 | inode->i_generation = sbi->s_next_generation++; | |
51 | ||
52 | err = insert_inode_locked(inode); | |
53 | if (err) { | |
54 | err = -EINVAL; | |
55 | nid_free = true; | |
56 | goto out; | |
57 | } | |
622f28ae | 58 | |
b3d208f9 JK |
59 | if (f2fs_may_inline(inode)) |
60 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); | |
622f28ae CY |
61 | if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode)) |
62 | set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); | |
63 | ||
d70b4f53 | 64 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
65 | mark_inode_dirty(inode); |
66 | return inode; | |
67 | ||
68 | out: | |
69 | clear_nlink(inode); | |
70 | unlock_new_inode(inode); | |
71 | fail: | |
d70b4f53 | 72 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 73 | make_bad_inode(inode); |
57397d86 JK |
74 | iput(inode); |
75 | if (nid_free) | |
76 | alloc_nid_failed(sbi, ino); | |
77 | return ERR_PTR(err); | |
78 | } | |
79 | ||
80 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
81 | { | |
9836b8b9 LR |
82 | size_t slen = strlen(s); |
83 | size_t sublen = strlen(sub); | |
57397d86 JK |
84 | |
85 | if (sublen > slen) | |
e66509f0 | 86 | return 0; |
57397d86 | 87 | |
749ebfd1 | 88 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
89 | } |
90 | ||
0a8165d7 | 91 | /* |
57397d86 JK |
92 | * Set multimedia files as cold files for hot/cold data separation |
93 | */ | |
953a3e27 | 94 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
95 | const unsigned char *name) |
96 | { | |
97 | int i; | |
98 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
99 | ||
100 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
101 | for (i = 0; i < count; i++) { | |
e66509f0 | 102 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 103 | file_set_cold(inode); |
57397d86 JK |
104 | break; |
105 | } | |
106 | } | |
107 | } | |
108 | ||
109 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
110 | bool excl) | |
111 | { | |
4081363f | 112 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
113 | struct inode *inode; |
114 | nid_t ino = 0; | |
e479556b | 115 | int err; |
57397d86 | 116 | |
1efef832 JK |
117 | f2fs_balance_fs(sbi); |
118 | ||
57397d86 JK |
119 | inode = f2fs_new_inode(dir, mode); |
120 | if (IS_ERR(inode)) | |
121 | return PTR_ERR(inode); | |
122 | ||
123 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 124 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
125 | |
126 | inode->i_op = &f2fs_file_inode_operations; | |
127 | inode->i_fop = &f2fs_file_operations; | |
128 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
129 | ino = inode->i_ino; | |
130 | ||
e479556b | 131 | f2fs_lock_op(sbi); |
57397d86 JK |
132 | err = f2fs_add_link(dentry, inode); |
133 | if (err) | |
134 | goto out; | |
44c16156 | 135 | f2fs_unlock_op(sbi); |
57397d86 JK |
136 | |
137 | alloc_nid_done(sbi, ino); | |
138 | ||
b3d208f9 | 139 | stat_inc_inline_inode(inode); |
0a364af1 | 140 | d_instantiate(dentry, inode); |
57397d86 | 141 | unlock_new_inode(inode); |
b7e1d800 JK |
142 | |
143 | if (IS_DIRSYNC(dir)) | |
144 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
145 | return 0; |
146 | out: | |
44c16156 | 147 | handle_failed_inode(inode); |
57397d86 JK |
148 | return err; |
149 | } | |
150 | ||
151 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
152 | struct dentry *dentry) | |
153 | { | |
2b0143b5 | 154 | struct inode *inode = d_inode(old_dentry); |
4081363f | 155 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 156 | int err; |
57397d86 | 157 | |
1efef832 JK |
158 | f2fs_balance_fs(sbi); |
159 | ||
57397d86 | 160 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 161 | ihold(inode); |
57397d86 JK |
162 | |
163 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 164 | f2fs_lock_op(sbi); |
57397d86 JK |
165 | err = f2fs_add_link(dentry, inode); |
166 | if (err) | |
167 | goto out; | |
44c16156 | 168 | f2fs_unlock_op(sbi); |
57397d86 JK |
169 | |
170 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
171 | |
172 | if (IS_DIRSYNC(dir)) | |
173 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
174 | return 0; |
175 | out: | |
176 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
177 | iput(inode); | |
44c16156 | 178 | f2fs_unlock_op(sbi); |
57397d86 JK |
179 | return err; |
180 | } | |
181 | ||
182 | struct dentry *f2fs_get_parent(struct dentry *child) | |
183 | { | |
184 | struct qstr dotdot = QSTR_INIT("..", 2); | |
2b0143b5 | 185 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot); |
57397d86 JK |
186 | if (!ino) |
187 | return ERR_PTR(-ENOENT); | |
2b0143b5 | 188 | return d_obtain_alias(f2fs_iget(d_inode(child)->i_sb, ino)); |
57397d86 JK |
189 | } |
190 | ||
510022a8 JK |
191 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
192 | { | |
193 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
194 | struct qstr dot = QSTR_INIT(".", 1); | |
195 | struct qstr dotdot = QSTR_INIT("..", 2); | |
196 | struct f2fs_dir_entry *de; | |
197 | struct page *page; | |
198 | int err = 0; | |
199 | ||
200 | f2fs_lock_op(sbi); | |
201 | ||
202 | de = f2fs_find_entry(dir, &dot, &page); | |
203 | if (de) { | |
204 | f2fs_dentry_kunmap(dir, page); | |
205 | f2fs_put_page(page, 0); | |
206 | } else { | |
207 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
208 | if (err) | |
209 | goto out; | |
210 | } | |
211 | ||
212 | de = f2fs_find_entry(dir, &dotdot, &page); | |
213 | if (de) { | |
214 | f2fs_dentry_kunmap(dir, page); | |
215 | f2fs_put_page(page, 0); | |
216 | } else { | |
217 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
218 | } | |
219 | out: | |
220 | if (!err) { | |
221 | clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS); | |
222 | mark_inode_dirty(dir); | |
223 | } | |
224 | ||
225 | f2fs_unlock_op(sbi); | |
226 | return err; | |
227 | } | |
228 | ||
57397d86 JK |
229 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
230 | unsigned int flags) | |
231 | { | |
232 | struct inode *inode = NULL; | |
233 | struct f2fs_dir_entry *de; | |
234 | struct page *page; | |
235 | ||
5a20d339 | 236 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
237 | return ERR_PTR(-ENAMETOOLONG); |
238 | ||
239 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
240 | if (de) { | |
241 | nid_t ino = le32_to_cpu(de->ino); | |
9486ba44 | 242 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
243 | f2fs_put_page(page, 0); |
244 | ||
245 | inode = f2fs_iget(dir->i_sb, ino); | |
246 | if (IS_ERR(inode)) | |
247 | return ERR_CAST(inode); | |
510022a8 JK |
248 | |
249 | if (f2fs_has_inline_dots(inode)) { | |
250 | int err; | |
251 | ||
252 | err = __recover_dot_dentries(inode, dir->i_ino); | |
253 | if (err) { | |
254 | iget_failed(inode); | |
255 | return ERR_PTR(err); | |
256 | } | |
257 | } | |
57397d86 JK |
258 | } |
259 | ||
260 | return d_splice_alias(inode, dentry); | |
261 | } | |
262 | ||
263 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
264 | { | |
4081363f | 265 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 266 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
267 | struct f2fs_dir_entry *de; |
268 | struct page *page; | |
269 | int err = -ENOENT; | |
270 | ||
a2a4a7e4 | 271 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
272 | f2fs_balance_fs(sbi); |
273 | ||
57397d86 JK |
274 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
275 | if (!de) | |
276 | goto fail; | |
277 | ||
ccaaca25 | 278 | f2fs_lock_op(sbi); |
cbd56e7d | 279 | err = acquire_orphan_inode(sbi); |
57397d86 | 280 | if (err) { |
ccaaca25 | 281 | f2fs_unlock_op(sbi); |
9486ba44 | 282 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
283 | f2fs_put_page(page, 0); |
284 | goto fail; | |
285 | } | |
dbeacf02 | 286 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 287 | f2fs_unlock_op(sbi); |
57397d86 | 288 | |
e1c42045 | 289 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 290 | mark_inode_dirty(inode); |
b7e1d800 JK |
291 | |
292 | if (IS_DIRSYNC(dir)) | |
293 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 294 | fail: |
a2a4a7e4 | 295 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
296 | return err; |
297 | } | |
298 | ||
feb7cbb0 JK |
299 | static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd) |
300 | { | |
7263b1bd | 301 | struct page *page = page_follow_link_light(dentry, nd); |
feb7cbb0 | 302 | |
7263b1bd | 303 | if (IS_ERR_OR_NULL(page)) |
feb7cbb0 JK |
304 | return page; |
305 | ||
306 | /* this is broken symlink case */ | |
307 | if (*nd_get_link(nd) == 0) { | |
7263b1bd | 308 | page_put_link(dentry, nd, page); |
feb7cbb0 JK |
309 | return ERR_PTR(-ENOENT); |
310 | } | |
311 | return page; | |
312 | } | |
313 | ||
57397d86 JK |
314 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
315 | const char *symname) | |
316 | { | |
4081363f | 317 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 318 | struct inode *inode; |
9836b8b9 | 319 | size_t symlen = strlen(symname) + 1; |
e479556b | 320 | int err; |
57397d86 | 321 | |
1efef832 JK |
322 | f2fs_balance_fs(sbi); |
323 | ||
57397d86 JK |
324 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
325 | if (IS_ERR(inode)) | |
326 | return PTR_ERR(inode); | |
327 | ||
328 | inode->i_op = &f2fs_symlink_inode_operations; | |
329 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
330 | ||
e479556b | 331 | f2fs_lock_op(sbi); |
57397d86 JK |
332 | err = f2fs_add_link(dentry, inode); |
333 | if (err) | |
334 | goto out; | |
44c16156 | 335 | f2fs_unlock_op(sbi); |
57397d86 JK |
336 | |
337 | err = page_symlink(inode, symname, symlen); | |
338 | alloc_nid_done(sbi, inode->i_ino); | |
339 | ||
340 | d_instantiate(dentry, inode); | |
341 | unlock_new_inode(inode); | |
b7e1d800 | 342 | |
d0cae97c JK |
343 | /* |
344 | * Let's flush symlink data in order to avoid broken symlink as much as | |
345 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
346 | * way to get a file descriptor in order to flush that. | |
347 | * | |
348 | * Note that, it needs to do dir->fsync to make this recoverable. | |
349 | * If the symlink path is stored into inline_data, there is no | |
350 | * performance regression. | |
351 | */ | |
352 | filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1); | |
353 | ||
b7e1d800 JK |
354 | if (IS_DIRSYNC(dir)) |
355 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
356 | return err; |
357 | out: | |
44c16156 | 358 | handle_failed_inode(inode); |
57397d86 JK |
359 | return err; |
360 | } | |
361 | ||
362 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
363 | { | |
4081363f | 364 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 365 | struct inode *inode; |
e479556b | 366 | int err; |
57397d86 | 367 | |
1efef832 JK |
368 | f2fs_balance_fs(sbi); |
369 | ||
57397d86 | 370 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 371 | if (IS_ERR(inode)) |
61412b64 | 372 | return PTR_ERR(inode); |
57397d86 JK |
373 | |
374 | inode->i_op = &f2fs_dir_inode_operations; | |
375 | inode->i_fop = &f2fs_dir_operations; | |
376 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 377 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 JK |
378 | |
379 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 380 | f2fs_lock_op(sbi); |
57397d86 JK |
381 | err = f2fs_add_link(dentry, inode); |
382 | if (err) | |
383 | goto out_fail; | |
44c16156 | 384 | f2fs_unlock_op(sbi); |
57397d86 | 385 | |
3289c061 | 386 | stat_inc_inline_dir(inode); |
57397d86 JK |
387 | alloc_nid_done(sbi, inode->i_ino); |
388 | ||
389 | d_instantiate(dentry, inode); | |
390 | unlock_new_inode(inode); | |
391 | ||
b7e1d800 JK |
392 | if (IS_DIRSYNC(dir)) |
393 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
394 | return 0; |
395 | ||
396 | out_fail: | |
397 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 398 | handle_failed_inode(inode); |
57397d86 JK |
399 | return err; |
400 | } | |
401 | ||
402 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
403 | { | |
2b0143b5 | 404 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
405 | if (f2fs_empty_dir(inode)) |
406 | return f2fs_unlink(dir, dentry); | |
407 | return -ENOTEMPTY; | |
408 | } | |
409 | ||
410 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
411 | umode_t mode, dev_t rdev) | |
412 | { | |
4081363f | 413 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
414 | struct inode *inode; |
415 | int err = 0; | |
416 | ||
417 | if (!new_valid_dev(rdev)) | |
418 | return -EINVAL; | |
419 | ||
1efef832 JK |
420 | f2fs_balance_fs(sbi); |
421 | ||
57397d86 JK |
422 | inode = f2fs_new_inode(dir, mode); |
423 | if (IS_ERR(inode)) | |
424 | return PTR_ERR(inode); | |
425 | ||
426 | init_special_inode(inode, inode->i_mode, rdev); | |
427 | inode->i_op = &f2fs_special_inode_operations; | |
428 | ||
e479556b | 429 | f2fs_lock_op(sbi); |
57397d86 JK |
430 | err = f2fs_add_link(dentry, inode); |
431 | if (err) | |
432 | goto out; | |
44c16156 | 433 | f2fs_unlock_op(sbi); |
57397d86 JK |
434 | |
435 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 436 | |
57397d86 JK |
437 | d_instantiate(dentry, inode); |
438 | unlock_new_inode(inode); | |
b7e1d800 JK |
439 | |
440 | if (IS_DIRSYNC(dir)) | |
441 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
442 | return 0; |
443 | out: | |
44c16156 | 444 | handle_failed_inode(inode); |
57397d86 JK |
445 | return err; |
446 | } | |
447 | ||
448 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
449 | struct inode *new_dir, struct dentry *new_dentry) | |
450 | { | |
4081363f | 451 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
452 | struct inode *old_inode = d_inode(old_dentry); |
453 | struct inode *new_inode = d_inode(new_dentry); | |
57397d86 | 454 | struct page *old_dir_page; |
cbd56e7d | 455 | struct page *old_page, *new_page; |
57397d86 JK |
456 | struct f2fs_dir_entry *old_dir_entry = NULL; |
457 | struct f2fs_dir_entry *old_entry; | |
458 | struct f2fs_dir_entry *new_entry; | |
e479556b | 459 | int err = -ENOENT; |
57397d86 | 460 | |
1efef832 JK |
461 | f2fs_balance_fs(sbi); |
462 | ||
57397d86 JK |
463 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
464 | if (!old_entry) | |
465 | goto out; | |
466 | ||
467 | if (S_ISDIR(old_inode->i_mode)) { | |
468 | err = -EIO; | |
469 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
470 | if (!old_dir_entry) | |
471 | goto out_old; | |
472 | } | |
473 | ||
57397d86 | 474 | if (new_inode) { |
57397d86 JK |
475 | |
476 | err = -ENOTEMPTY; | |
477 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
478 | goto out_dir; | |
479 | ||
480 | err = -ENOENT; | |
481 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
482 | &new_page); | |
483 | if (!new_entry) | |
484 | goto out_dir; | |
485 | ||
1256010a CY |
486 | f2fs_lock_op(sbi); |
487 | ||
cbd56e7d JK |
488 | err = acquire_orphan_inode(sbi); |
489 | if (err) | |
490 | goto put_out_dir; | |
491 | ||
1cd14caf | 492 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
493 | release_orphan_inode(sbi); |
494 | goto put_out_dir; | |
1cd14caf JK |
495 | } |
496 | ||
57397d86 JK |
497 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
498 | ||
499 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 500 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
501 | if (old_dir_entry) |
502 | drop_nlink(new_inode); | |
503 | drop_nlink(new_inode); | |
d928bfbf JK |
504 | up_write(&F2FS_I(new_inode)->i_sem); |
505 | ||
a18ff063 | 506 | mark_inode_dirty(new_inode); |
cbd56e7d | 507 | |
57397d86 JK |
508 | if (!new_inode->i_nlink) |
509 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
510 | else |
511 | release_orphan_inode(sbi); | |
512 | ||
8cb82688 | 513 | update_inode_page(old_inode); |
39936837 | 514 | update_inode_page(new_inode); |
57397d86 | 515 | } else { |
1256010a CY |
516 | f2fs_lock_op(sbi); |
517 | ||
57397d86 | 518 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
519 | if (err) { |
520 | f2fs_unlock_op(sbi); | |
57397d86 | 521 | goto out_dir; |
1256010a | 522 | } |
57397d86 JK |
523 | |
524 | if (old_dir_entry) { | |
525 | inc_nlink(new_dir); | |
39936837 | 526 | update_inode_page(new_dir); |
57397d86 JK |
527 | } |
528 | } | |
529 | ||
b2c08299 JK |
530 | down_write(&F2FS_I(old_inode)->i_sem); |
531 | file_lost_pino(old_inode); | |
532 | up_write(&F2FS_I(old_inode)->i_sem); | |
533 | ||
57397d86 | 534 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
535 | mark_inode_dirty(old_inode); |
536 | ||
dbeacf02 | 537 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
538 | |
539 | if (old_dir_entry) { | |
540 | if (old_dir != new_dir) { | |
541 | f2fs_set_link(old_inode, old_dir_entry, | |
542 | old_dir_page, new_dir); | |
a18ff063 | 543 | update_inode_page(old_inode); |
57397d86 | 544 | } else { |
9486ba44 | 545 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
546 | f2fs_put_page(old_dir_page, 0); |
547 | } | |
548 | drop_nlink(old_dir); | |
a18ff063 | 549 | mark_inode_dirty(old_dir); |
39936837 | 550 | update_inode_page(old_dir); |
57397d86 JK |
551 | } |
552 | ||
e479556b | 553 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
554 | |
555 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
556 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
557 | return 0; |
558 | ||
cbd56e7d | 559 | put_out_dir: |
1256010a | 560 | f2fs_unlock_op(sbi); |
9486ba44 | 561 | f2fs_dentry_kunmap(new_dir, new_page); |
dd4d961f | 562 | f2fs_put_page(new_page, 0); |
57397d86 JK |
563 | out_dir: |
564 | if (old_dir_entry) { | |
9486ba44 | 565 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
566 | f2fs_put_page(old_dir_page, 0); |
567 | } | |
57397d86 | 568 | out_old: |
9486ba44 | 569 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
570 | f2fs_put_page(old_page, 0); |
571 | out: | |
572 | return err; | |
573 | } | |
574 | ||
32f9bc25 CY |
575 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
576 | struct inode *new_dir, struct dentry *new_dentry) | |
577 | { | |
4081363f | 578 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
579 | struct inode *old_inode = d_inode(old_dentry); |
580 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
581 | struct page *old_dir_page, *new_dir_page; |
582 | struct page *old_page, *new_page; | |
583 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
584 | struct f2fs_dir_entry *old_entry, *new_entry; | |
585 | int old_nlink = 0, new_nlink = 0; | |
586 | int err = -ENOENT; | |
587 | ||
588 | f2fs_balance_fs(sbi); | |
589 | ||
590 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
591 | if (!old_entry) | |
592 | goto out; | |
593 | ||
594 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
595 | if (!new_entry) | |
596 | goto out_old; | |
597 | ||
598 | /* prepare for updating ".." directory entry info later */ | |
599 | if (old_dir != new_dir) { | |
600 | if (S_ISDIR(old_inode->i_mode)) { | |
601 | err = -EIO; | |
602 | old_dir_entry = f2fs_parent_dir(old_inode, | |
603 | &old_dir_page); | |
604 | if (!old_dir_entry) | |
605 | goto out_new; | |
606 | } | |
607 | ||
608 | if (S_ISDIR(new_inode->i_mode)) { | |
609 | err = -EIO; | |
610 | new_dir_entry = f2fs_parent_dir(new_inode, | |
611 | &new_dir_page); | |
612 | if (!new_dir_entry) | |
613 | goto out_old_dir; | |
614 | } | |
615 | } | |
616 | ||
617 | /* | |
618 | * If cross rename between file and directory those are not | |
619 | * in the same directory, we will inc nlink of file's parent | |
620 | * later, so we should check upper boundary of its nlink. | |
621 | */ | |
622 | if ((!old_dir_entry || !new_dir_entry) && | |
623 | old_dir_entry != new_dir_entry) { | |
624 | old_nlink = old_dir_entry ? -1 : 1; | |
625 | new_nlink = -old_nlink; | |
626 | err = -EMLINK; | |
627 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
628 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
629 | goto out_new_dir; | |
630 | } | |
631 | ||
632 | f2fs_lock_op(sbi); | |
633 | ||
634 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
635 | if (err) | |
636 | goto out_unlock; | |
637 | ||
638 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
639 | if (err) | |
640 | goto out_undo; | |
641 | ||
642 | /* update ".." directory entry info of old dentry */ | |
643 | if (old_dir_entry) | |
644 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
645 | ||
646 | /* update ".." directory entry info of new dentry */ | |
647 | if (new_dir_entry) | |
648 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
649 | ||
650 | /* update directory entry info of old dir inode */ | |
651 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
652 | ||
653 | down_write(&F2FS_I(old_inode)->i_sem); | |
654 | file_lost_pino(old_inode); | |
655 | up_write(&F2FS_I(old_inode)->i_sem); | |
656 | ||
657 | update_inode_page(old_inode); | |
658 | ||
659 | old_dir->i_ctime = CURRENT_TIME; | |
660 | if (old_nlink) { | |
661 | down_write(&F2FS_I(old_dir)->i_sem); | |
662 | if (old_nlink < 0) | |
663 | drop_nlink(old_dir); | |
664 | else | |
665 | inc_nlink(old_dir); | |
666 | up_write(&F2FS_I(old_dir)->i_sem); | |
667 | } | |
668 | mark_inode_dirty(old_dir); | |
669 | update_inode_page(old_dir); | |
670 | ||
671 | /* update directory entry info of new dir inode */ | |
672 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
673 | ||
674 | down_write(&F2FS_I(new_inode)->i_sem); | |
675 | file_lost_pino(new_inode); | |
676 | up_write(&F2FS_I(new_inode)->i_sem); | |
677 | ||
678 | update_inode_page(new_inode); | |
679 | ||
680 | new_dir->i_ctime = CURRENT_TIME; | |
681 | if (new_nlink) { | |
682 | down_write(&F2FS_I(new_dir)->i_sem); | |
683 | if (new_nlink < 0) | |
684 | drop_nlink(new_dir); | |
685 | else | |
686 | inc_nlink(new_dir); | |
687 | up_write(&F2FS_I(new_dir)->i_sem); | |
688 | } | |
689 | mark_inode_dirty(new_dir); | |
690 | update_inode_page(new_dir); | |
691 | ||
692 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
693 | |
694 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
695 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
696 | return 0; |
697 | out_undo: | |
698 | /* Still we may fail to recover name info of f2fs_inode here */ | |
699 | update_dent_inode(old_inode, &old_dentry->d_name); | |
700 | out_unlock: | |
701 | f2fs_unlock_op(sbi); | |
702 | out_new_dir: | |
703 | if (new_dir_entry) { | |
9486ba44 | 704 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
705 | f2fs_put_page(new_dir_page, 0); |
706 | } | |
707 | out_old_dir: | |
708 | if (old_dir_entry) { | |
9486ba44 | 709 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
710 | f2fs_put_page(old_dir_page, 0); |
711 | } | |
712 | out_new: | |
9486ba44 | 713 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
714 | f2fs_put_page(new_page, 0); |
715 | out_old: | |
9486ba44 | 716 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
717 | f2fs_put_page(old_page, 0); |
718 | out: | |
719 | return err; | |
720 | } | |
721 | ||
722 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
723 | struct inode *new_dir, struct dentry *new_dentry, | |
724 | unsigned int flags) | |
725 | { | |
726 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
727 | return -EINVAL; | |
728 | ||
729 | if (flags & RENAME_EXCHANGE) { | |
730 | return f2fs_cross_rename(old_dir, old_dentry, | |
731 | new_dir, new_dentry); | |
732 | } | |
733 | /* | |
734 | * VFS has already handled the new dentry existence case, | |
735 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
736 | */ | |
737 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
738 | } | |
739 | ||
50732df0 CY |
740 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
741 | { | |
4081363f | 742 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 743 | struct inode *inode; |
50732df0 CY |
744 | int err; |
745 | ||
746 | inode = f2fs_new_inode(dir, mode); | |
747 | if (IS_ERR(inode)) | |
748 | return PTR_ERR(inode); | |
749 | ||
750 | inode->i_op = &f2fs_file_inode_operations; | |
751 | inode->i_fop = &f2fs_file_operations; | |
752 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
753 | ||
754 | f2fs_lock_op(sbi); | |
755 | err = acquire_orphan_inode(sbi); | |
756 | if (err) | |
757 | goto out; | |
b97a9b5d JK |
758 | |
759 | err = f2fs_do_tmpfile(inode, dir); | |
760 | if (err) | |
761 | goto release_out; | |
762 | ||
50732df0 CY |
763 | /* |
764 | * add this non-linked tmpfile to orphan list, in this way we could | |
765 | * remove all unused data of tmpfile after abnormal power-off. | |
766 | */ | |
767 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
768 | f2fs_unlock_op(sbi); |
769 | ||
770 | alloc_nid_done(sbi, inode->i_ino); | |
3c0d84d6 CY |
771 | |
772 | stat_inc_inline_inode(inode); | |
50732df0 CY |
773 | d_tmpfile(dentry, inode); |
774 | unlock_new_inode(inode); | |
775 | return 0; | |
b97a9b5d JK |
776 | |
777 | release_out: | |
778 | release_orphan_inode(sbi); | |
50732df0 | 779 | out: |
44c16156 | 780 | handle_failed_inode(inode); |
50732df0 CY |
781 | return err; |
782 | } | |
783 | ||
57397d86 JK |
784 | const struct inode_operations f2fs_dir_inode_operations = { |
785 | .create = f2fs_create, | |
786 | .lookup = f2fs_lookup, | |
787 | .link = f2fs_link, | |
788 | .unlink = f2fs_unlink, | |
789 | .symlink = f2fs_symlink, | |
790 | .mkdir = f2fs_mkdir, | |
791 | .rmdir = f2fs_rmdir, | |
792 | .mknod = f2fs_mknod, | |
32f9bc25 | 793 | .rename2 = f2fs_rename2, |
50732df0 | 794 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 795 | .getattr = f2fs_getattr, |
57397d86 JK |
796 | .setattr = f2fs_setattr, |
797 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 798 | .set_acl = f2fs_set_acl, |
57397d86 JK |
799 | #ifdef CONFIG_F2FS_FS_XATTR |
800 | .setxattr = generic_setxattr, | |
801 | .getxattr = generic_getxattr, | |
802 | .listxattr = f2fs_listxattr, | |
803 | .removexattr = generic_removexattr, | |
804 | #endif | |
805 | }; | |
806 | ||
807 | const struct inode_operations f2fs_symlink_inode_operations = { | |
808 | .readlink = generic_readlink, | |
feb7cbb0 | 809 | .follow_link = f2fs_follow_link, |
57397d86 | 810 | .put_link = page_put_link, |
2d4d9fb5 | 811 | .getattr = f2fs_getattr, |
57397d86 JK |
812 | .setattr = f2fs_setattr, |
813 | #ifdef CONFIG_F2FS_FS_XATTR | |
814 | .setxattr = generic_setxattr, | |
815 | .getxattr = generic_getxattr, | |
816 | .listxattr = f2fs_listxattr, | |
817 | .removexattr = generic_removexattr, | |
818 | #endif | |
819 | }; | |
820 | ||
821 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 822 | .getattr = f2fs_getattr, |
57397d86 JK |
823 | .setattr = f2fs_setattr, |
824 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 825 | .set_acl = f2fs_set_acl, |
57397d86 JK |
826 | #ifdef CONFIG_F2FS_FS_XATTR |
827 | .setxattr = generic_setxattr, | |
828 | .getxattr = generic_getxattr, | |
829 | .listxattr = f2fs_listxattr, | |
830 | .removexattr = generic_removexattr, | |
831 | #endif | |
832 | }; |